Ag flake/silicone rubber composite with high stability and stretching speed insensitive resistance via conductive bridge formation

In Seon Yoon, Sun Hong Kim, Youngsu Oh, Byeong Kwon Ju, Jae Min Hong

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

High stability, stretchable speed insensitive properties, high stretchability, and electrical conductivity are key characteristics for the realisation of wearable devices. However, conventional research is mainly focused on achieving only high stretchability and electrical conductivity. Studies on the stability and stretching speed insensitive properties generally require complex fabrication processes, which are in need of further improvement. In this study, we propose a facile formation of a conductive bridge in composites by using surface damage and the viscoelastic property of the polymer. Surface cracks due to repeated stretching cycles formed conductive bridges via stress relaxation of the viscoelastic polymer matrix. The conductive bridge resulted in the conductor having highly stable resistance values at target strains and stretching speed insensitive resistance, even at stretching speeds that were 20 times faster than the minimum.

Original languageEnglish
Article number5036
JournalScientific reports
Volume10
Issue number1
DOIs
Publication statusPublished - 2020 Dec 1

Bibliographical note

Funding Information:
This work was partly supported by the Industrial Fundamental Technology Development Program of the Ministry of Trade and Industry and the Energy/Korea Evaluation Institute of Industrial Technology (10051162, Development of 3D-Deformable Multilayered FPCB Devices) as well as the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (No. R1912402), and the Brain Korea 21 Plus Project in 2020.

Publisher Copyright:
© 2020, The Author(s).

ASJC Scopus subject areas

  • General

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